{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"4N25SR2VM","brand":"onsemi","brandSlug":"onsemi","productSlug":"4N25SR2VM","canonicalUrl":"https://icboms.com/onsemi/4N25SR2VM","factsUrl":"https://icboms.com/api/mcp/products/4N25SR2VM","rawCanonicalId":null},"summary":{"shortDescription":"onsemi 4N25SR2VM single-channel phototransistor optoisolator, DC input, transistor with base output, 4170Vrms isolation, 6-SMD Gull Wing package, Tape & Reel.","salesMarkdown":"## Isolation barrier and signal transfer The 4N25SR2VM is a single-channel phototransistor optoisolator from onsemi, built around a GaAs infrared LED and a silicon NPN phototransistor in a 6-SMD Gull Wing package. Its 4170Vrms isolation voltage defines the safety barrier between the input and output circuits — enough for reinforced insulation in mains-powered equipment where the control side must stay galvanically separated from the high-voltage bus. The DC input type means the LED is driven by a steady forward current — no AC line rectification is needed. With a typical forward voltage of 1.18V and a maximum DC forward current of 60 mA, the input side is compatible with standard 3.3V or 5V logic outputs through a series resistor. ## Current transfer ratio and switching speed The minimum current transfer ratio (CTR) is 20% at 10 mA forward current — this is the coupling efficiency floor. For a given input current, the output phototransistor collector current will be at least one-fifth of the LED drive. That ratio sets the pull-up resistor value on the output side and determines whether the output swings rail-to-rail within the logic threshold. Turn-on and turn-off times are both 2 µs typical, giving a combined propagation delay of about 4 µs. This limits the usable signal bandwidth to roughly 100 kHz for digital signals — adequate for slow GPIO isolation, relay drivers, or status feedback, but not for high-speed data links. The output is a phototransistor with the base brought out to a separate pin. This lets the designer add a base-emitter resistor to speed up turn-off by bleeding stored charge, or bias the base for a specific operating point — useful when the CTR variation across temperature must be tightened. ## Package, temperature range, and sourcing The 6-SMD Gull Wing package has a standard 7.62 mm (300 mil) body width and a 1.27 mm pin pitch — the same footprint as the DIP-6 through-hole version, but in a surface-mount format that reflows on a standard lead-free profile. Operating temperature spans -40°C to 100°C, covering industrial control cabinets, power supply feedback loops, and motor drive interface boards. The maximum Vce saturation is 500 mV, and the output can handle up to 30V collector-to-emitter.","metaTitle":"onsemi 4N25SR2VM Optoisolator, 4170Vrms, 6-SMD Gull Wing","metaDescription":"onsemi 4N25SR2VM single-channel phototransistor optoisolator. 4170Vrms isolation, 20% min CTR at 10mA, 2µs switching. Active production, available to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Optoisolators"],"specifications":{"Mfr":"onsemi","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Input Type":"DC","Output Type":"Transistor with Base","Mounting Type":"Surface Mount","Package / Case":"6-SMD, Gull Wing","Product Status":"Active","lifecycle_stage":"eol_hot","Number of Channels":"1","Base Product Number":"4N25","Voltage - Isolation":"4170Vrms","Vce Saturation (Max)":"500mV","Operating Temperature":"-40°C~100°C","Rise / Fall Time (Typ)":"-","Voltage - Output (Max)":"30V","Supplier Device Package":"6-SMD","Current - Output / Channel":"-","Current Transfer Ratio (Max)":"-","Current Transfer Ratio (Min)":"20% @ 10mA","Voltage - Forward (Vf) (Typ)":"1.18V","Turn On / Turn Off Time (Typ)":"2µs, 2µs","Current - DC Forward (If) (Max)":"60 mA"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.8800","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d7db4dc53d56bf7e534658a700fb47e3.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/4N25SR2VM/alternatives.json"},"ai":{"faq":[{"question":"What is the minimum current transfer ratio for the 4N25SR2VM?","answer":"The minimum CTR is 20% at 10 mA forward current. At that drive level, the output phototransistor will sink at least 2 mA — enough to pull a 5V logic input low through a 2.2 kΩ resistor."},{"question":"What package does the 4N25SR2VM come in?","answer":"The 4N25SR2VM is supplied in a 6-SMD Gull Wing surface-mount package. The base part number 4N25 also exists in a DIP-6 through-hole version, but the SR2VM suffix specifically denotes the SMD variant in Tape & Reel packaging."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/onsemi/4N25SR2VM","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/onsemi/4N25SR2VM when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}